<template>
  <div class="my-counter">
    <button @click="changeCount('-')" type="button" class="btn btn-light" >-</button>
    <input disabled v-model="obj.goods_count" type="number" class="form-control inp" >
    <button @click="changeCount('+')" type="button" class="btn btn-light">+</button>
  </div>
</template>

<script>
export default {
  props: {
    obj: {
      required: true, // required是固定写法，true表示obj为必传值
      type: Object // type 是固定写法，用于规定obj传入的数据类型
    }
  },
  methods: {
    changeCount(type){
      if(type === "-"){
        this.obj.goods_count = this.obj.goods_count>1?this.obj.goods_count-1: 1
      }else{
        this.obj.goods_count++
      }
    }
  }
}
</script>

<style lang="less" scoped>
.my-counter {
  display: flex;
  .inp {
    width: 45px;
    text-align: center;
    margin: 0 10px;
  }
  .btn, .inp{
    transform: scale(0.9);
  }
}
</style>